US4910114A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Toner for electrophotography
Assignee: Resonac Corp
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Filing: 1987-05-04
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Granted: 1990-03-20
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Expires: 2007-05-04
Abstract
Abstract A toner for electrophotography containing as a binder a polymer comprising as essential ingredient a high-molecular-weight monofunctional monomer having a weight average molecular weight of 1,000 to 50,000 and an ethylenic double bond only at one end of the molecular chain is excellent in fixing properties in a heat roll fixing process and anti-offset properties.
Inventors
- 👤 Yukihisa Hosino
- 👤 Takeo Kudo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 04:27
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/087; G03G9/08784; G03G9/08791; G03G9/08702; G03G9/08795; Y; Y10; Y10S; Y10S526/00; Y10S526/934
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
41 words
A toner for electrophotography containing as binder a polymer comprising as essential ingredient a high molecular weight monofunctional monomer of 1,000 to 50,000 in weight average molecular weight and having an ethylenic double bond at one end of the molecular chain.
Claim 2
Dependent Claim
41 words
A toner for electrophotography containing as binder a polymer comprising as essential ingredient a high molecular weight monofunctional monomer of 1,000 to 50,000 in weight average molecular weight and having an ethylenic double bond at one end of the molecular chain.
Claim 3
Dependent Claim
49 words
A toner for electrophotography according to claim 1, wherein the high molecular weight monofunctional monomer is that obtained by the reaction of an active living polymer with a compound having an ethylenic double bond and a functional group capable of undergoing nucleophilic substitution reaction with said active living polymer.
Claim 4
Dependent Claim
30 words
A toner for electrophotography according to claim 1, wherein the high molecular weight monofunctional monomer is that containing in its molecule a polymer chain of styrene and/or a styrene derivative.
Claim 5
Dependent Claim
22 words
A toner for electrophotography according to claim 2, wherein the active living polymer is that obtained from styrene and/or a styrene derivative.
Claim 6
Dependent Claim
25 words
A toner for electrophotography according to claim 1, wherein the weight average molecular weight of the high molecular weight monofunctional monomer is 5,000 to 30,000.
Claim 7
Dependent Claim
58 words
A toner for electrophotography according to claim 1, wherein the polymer is that obtained by mixing 0.1 to 50% by weight of the high molecular weight monofunctional monomer and 50 to 99.9% by weight of other monomer copolymerizable with said high molecular weight monofunctional monomer to form 100% by weight of a mixture and polymerizing the resulting mixture.
Claim 8
Dependent Claim
58 words
A toner for electrophotography according to claim 1, wherein the polymer is that obtained by mixing 1 to 40% by weight of the high moeecular weight monofunctional monomer and 60 to 99% by weight of other monomer copolymerizable with said high molecular weight monofunctional monomer to form 100% by weight of a mixture and polymerizing the resulting mixture.
Claim 9
Dependent Claim
21 words
A toner for electrophotography according to claim 1, wherein the binder further comprises up to 99% by weight of other resins.
Claim 10
Dependent Claim
19 words
A toner for electrophotography according to claim 1, wherein the tone further contains a pigment and/or a magnetic powder.
Claim 11
Dependent Claim
41 words
A toner for electrophotography according to claim 8, wherein said other resins are selected from the group consisting of styrene resins, copolystyrene-acrylic resins, silicone resins, polyester-carbonate resins, xylene resins, epoxy resins, phenolic resins,ddiene-base resins, coumarone resins, amide resins and urethane resins.
Claim 12
Dependent Claim
83 words
A toner for electrophotography containing as a binder a polymer obtained by polymerizing a high molecular weight monofunctional monomer having a weight average molecular weight of 1,000 to 50,000 and having an ethylenic double bond at one end of the molecular chain with other monomer, copolymerizable with said high molecular weight monofunctional monomer, to provide a polymeric structure in which a high molecular weight side chain originated from the high molecular weight monofunctional monomer is attached as a branch to the main chain.
Claim 13
Dependent Claim
83 words
A toner for electrophotography containing as a binder a polymer obtained by polymerizing a high molecular weight monofunctional monomer having a weight average molecular weight of 1,000 to 50,000 and having an ethylenic double bond at one end of the molecular chain with other monomer, copolymerizable with said high molecular weight monofunctional monomer, to provide a polymeric structure in which a high molecular weight side chain originated from the high molecular weight monofunctional monomer is attached as a branch to the main chain.
Claim 14
Dependent Claim
49 words
A toner for electrophotography according to claim 11, wherein the high molecular weight monofunctional monomer is that obtained by the reaction of an active living polymer with a compound having an ethylenic double bond and a functional group capable of undergoing nucleophilic substitution reaction with said active living polymer.
Claim 15
Dependent Claim
30 words
A toner for electrophotography according to claim 11, wherein the high molecular weight monofunctional monomer is that containing in its molecule a polymer chain of styrene and/or a styrene derivative.
Claim 16
Dependent Claim
22 words
A toner for electrophotography according to claim 12, wherein the active living polymer is that obtained from styrene and/or a styrene derivative.
Claim 17
Dependent Claim
25 words
A toner for electrophotography according to claim 11, wherein the weight average molecular weight of the high molecular weight monofunctional monomer is 5,000 to 30,000.
Claim 18
Dependent Claim
58 words
A toner for electrophotography according to claim 11, wherein the polymer is that obtained by mixing 0.1 to 50% by weight of the high molecular weight monofunctional monomer and 50 to 99.9% by weight of other monomer copolymerizable with said high molecular weight monofunctional monomer to form 100% by weight of a mixture and polymerizing the resulting mixture.
Claim 19
Dependent Claim
58 words
A toner for electrophotography according to claim 11, wherein the polymer is that obtained by mixing 1 to 40% by weight of the high molecular weight monofunctional monomer and 60 to 99% by weight of other monomer copolymerizable with said high molecular weight monofunctional monomer to form 100% by weight of a mixture and polymerizing the resulting mixture.
Claim 20
Dependent Claim
21 words
A toner for electrophotography according to claim 11, wherein the binder further comprises up to 99% by weight of other resins.
Claim 21
Dependent Claim
19 words
A toner for electrophotography according to claim 11, wherein the toner further contains a pigment and/or a magnetic powder.
Claim 22
Dependent Claim
42 words
A toner for electrophotography according to claim 18, wherein said other resins are selected from the group consisting of styrene resins, copolystyrene-acrylic resins, silicon resins, polyester-carbonate resins, xylene resins, epoxy resins, phenolic resins, diene-base resins, coumarone resins, amide resins and urethane resins.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-03-19 | 1993-09-18 | 1994-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-19 | 1997-09-18 | 1998-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-19 | 2001-09-18 | 2002-03-20 | $7700.00 | Window Closed / Lapsed |